Mill-dog for head-blocks.



o. o. HUNTINGTON. MILL DOG FOR BEAD BLOCKS.

APPLICATION FILED JUNE I9, 1913*.

1,105,328, l Patented .my 2s, 1914.

UNITED gSTATES PATENT oFFIonf OORY o. HUNTINGTON, OF OENTRALIA,WASHINGTON, AssIGNoaoroNnJIALF To n GEORGEG. snELY, OF PORTLAND,OREGON.; i l

MILL-noe ron HEAD-BLOCKS.

To all whom it may Concern:

Be it known that I, Conv O. HUNTING- TON, a citizen of the UnitedStates, residing at C'entralia, in the county of Lewis `and State ofIVaShingtOn, have invented certain new and useful Improvements inMill-Dogs for Head-Blocks, of which the following is a specification.

My invention relatesto mill dogs for head blocks, and has for itsobjecttov provide an improved means for holding'dogs upon saw milll carriages.

A further object is `to provide a series of eccentric levers forOperating mill dogs to engage and hold the dog in place.

These and other object-s will appear from,

a description of the structure shown in' the accompanying drawing, in,which- Figure 1 is a side elevation showing the eccentric levers inworking position. Fig. 2

is an edge view ofthe same. "'Fig. 3 is a 'de-'pl tail view of a key forclamping the dog upon the upright. Fig. 4 is a detail view inperspective, showing the operative mechanism for the under dog.

Describing the drawing in detail, 1 is the upright lever secured uponthe straps'4 of the eccentric disk 5 which is mounted upon the shaft 10which passes through the standard 15 and has at its outer end anadjustable support 10a. and stra is secured theforkG of the lever 18,whic i fork is mounted upon the shaft 10 and fixed by means ofbolt 19 tothe disk 5 so that they will move together upon said shaft. The arms ofthe fork extend across the strap and prevent lateral movement thereof onthe disk. 9 is a stop memberpro'- jecting from the lower side of thestraps 4 adapted to strike upon the base 16 and thus limit the movementof the straps. 7 is a weighted lever eccentrically mounted in thebracket 12 which is slidably secured upon the bar 8 liXed upon saiddisk, which is formed preferably on the arc of a circle.

Upon the shaft 10 at the outer side of the fork is slidably mounted, bymeans of the slot 11, the under dog 11 which has the forwardly andupwardly projectingy pointed arm 11b ada ted to engage the lowerportionof a log an the rearwardly extending portion 11a which passesthrough` the aperture 12a of the bracket 12, and to which is fixed' theright angled terminal 11e. It ywill be seen that the dog 11 willbe'readily adjust- `secured a key 22and Vupon it is `:bear the'eccentric23 rof the ,lever 24; `which Over they eccentric disk Specification ofLetters Patent. 7 PatentdJuly 1914,r Application mea :rune 19,1913.yseria; N.j774,5s5.`

vable longitudinally inv the bracket`112` and upon the shaft 10. Thebracket also is freelyy f movable upon the bar 8 `until it is lockedthereon by meansof the lever 7 bearing upon the key l3,held injplace `bylugs 13%. In thismannerthedog is adjustable to any riage blocks 16.,

size' and position of theloguponlthe carr'Ihe upper dog 2 is secureduponthe .uprighth and overan'open side thereof, kinthe bearing lugs` 20, ismounted.' the eccentrick lever `3. j Beneath the eccentric tsecurelylock the dog inplace. f V

In thel upperend of'theL forky is slidably is `mounted upon thelever '18to" form a brake `or safety lock for preventing relative movementbetween `Athe eccentric and straps. This prevents the lever 18 fromdropping yback upon thevk block 16 when not in operation; and itprevents the forward movement carrying theweight of a log.

In operationflthe log "17 will be placed upon thek block 16 andthe upperdog 2 moved down to engagement therewith, when it will be locked bydropping the lever 3.

adapted tov thereof against bar 1 when the under dog is The lever 18will stand normally in vertical position as seenin Fig. 1, and the underdog will' be thrust forward against the log and locked by the lever 7.Now, upon releasing lever 24the lever 18 `will be thrown back, shiftingthe disk 5in the eccentric strap. This movementwill have the effect/todraw the upright bar 1 downwardly forcing the dog 2 into the log 17; andat the same timer dog 11.y will `be raised and forced into the llog frombelow. Byreversing the movement of the lever, the dogs may be moved fromeach other; and thelever andv upright may be moved together on thecentral shaft.

Having thus described my invention so that others skilled inthe art towhich it pertains may-.make andusethe same, what I claim as new anddesirejt-o secure by Letters Patent, isi 1. In a mill dog, a base, aneccentric disk mounted thereon, anl eccentric strap coperating with thedisk, an upright lever fixed upon said strap, a dog secured thereon, a

loo

7o weight will:

dog mounted upon the disk in coperative relation thereto', and a leversecured to the disk for rockingit, to effect verticaly movement of saiddogs.

2. In a mill dog, a base, an eccentric diskmounted thereon, an eccentricstrap coperating with the disk, an upright lever fixed upon the saidstrap, a dog securedthereon, a. dog mounted for horizontal adjustment onsaid disk in cooperative relation to the irst'n'ientioned dog and alever fixed to the disk for rocking it to eHect vertical movement of thedogs. l e

3. In a mill dog, a base, an eccentric disk `mounted thereon, aneccentric strap coperating with the disk,v an upright lever fixed uponthe Vsaid strap, a dog secured thereon, a dog mounted for horizontaladjustment `on said. disk in coperative relation to the 'first mentioneddog, a lever xed to the disk for rocking it to effect vertical movementof the dogs, and means for varying the angle of the second mentioneddog.

Vt. In a mill dog, a base, an eccentric disk mounted thereon, aneccentric strappcoper! ating therewith, an upright lever; fixed to saidstrap, a dog slidably secured on the upright, a dog opposed thereto andadapted transversely therein, an eccentric mounted upon said shaft, aneccentric strap coperating therewith, an upright carrying an upper dog,secured to the eccentric strap at the narrow side of the eccentric disk,a lever fixed to the disk, a guide bar secured upon the disk at thebroadside thereof, a bracket movableupon said bar and adapted to be locked atany desired point thereon, and an under dog slidably mounted upon saidshaftand movable through an Aaperture in said bracket, whereby therelative angle and lon- `gritudinal position of the lower dog may bevaried and by shifting said lever, the dogs may be moved toward or fromeach other.

e 'In testimony whereof I affix my signature in presence of twowitnesses.

{lVitnessesz Y A. J. MATTER, E I-IE'OKBERT.

fC-Vopiel of this `patent may be obtained for Ave. eentsseeach,` by.addressing the Commissioner of Patents,

Washington, D. C. v

CORY O. HUNTINGTUN. r

